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DES-7200 Configuration Guide Chapter 4 OSPF
Configuration
4-19
Command Function
DES-7200 (config-router)#timers spf
spf-delay spf-holdtime
Configure the route calculation timer, in
seconds.
Caution
The configurations of timers spf command and timers throttle spf command
will be overwritten. The latter command configuration takes effect. If neither of
the two commands is configured, the default value is the configuration of the
timers throttle spf command.
The timers throttle spf command is more powerful than the timers spf
command. To this end, it is recommended to use the timers throttle spf
command.
4.2.12 Changing the LSA Group Pacing Timer
Each LSA has its own refersh and aging time. Calculating the refersh and aging
of each LAS respectively consumes lots of CPU. To make full use of CPU, refresh
and age the LSAs uniformly.
The default is 4 minutes. This parameter needs not to be adjusted often. The
optimum group pacing interval is inversely proportional to the number of LSAs
that need to be calculated. For example, if you have approximately 10,000 LSAs
in the database, decreasing the pacing interval would be better. If the switch has a
small database (40 to 100 LSAs), increasing the pacing interval to 10 to 20
minutes might be better. To configure OSPF LSA pacing, follow these steps in the
privileged mode:
Command Meaning
DES-7200 # configure terminal
Enter the global configuration mode.
DES-7200(config)# router ospf 1
Enter the routing protocol configuration
mode.
DES-7200 (config-router)# timers
lsa-group-pacing seconds
(Optional) Change the LSAs group pacing.
DES-7200 (config-router)# end
Return to the privileged EXEC mode.
DES-7200 # show running-config
Verify the configuration.
DES-7200 # write
(Optional) Save the configuration.
To restore the settings to the default value, use the no timers lsa-group-pacing
in the global configuration mode.